# SDR 99ZZZX339

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N952CC](https://openairdocs.org/aircraft/N952CC), registered now
- Make and model: Cessna 182P
- Registry model: [Cessna 182P](https://openairdocs.org/model/cessna-182p) (OpenAirDocs)
- Aircraft serial: 18263638
- Engine: Cont O470U
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 654650
- Condition: Worn
- Location: Engine
- Part time: 468 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX339

## Discrepancy

DURING A ROUTINE 50 OIL CHANGE/COMPRESSION CHECK, THE NR 3 CYLINDER WAS FOUND TO HAVE LEAKAGE PAST THE EXHAUST AND PISTON RINGS.  THE REMOVED CYLINDER WAS FOUND TO HAVE A WORN OUT EXHAUST VALVE, EXHAUST VALVE GUIDE, AND CYLINDER BARREL (NO CHOKE).  THE CYLINDER ASSEMBLY WAS REPLACED WITH A NEW UNIT.  SUBMITTER SUGGESTED POSSIBLE CAUSE AS DEFECTIVE PARTS OR ASSEMBLY PROCESS FROM THE FACTORY.

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